Panel for selectively absorbing solar thermal energy and the...

Parabolic reflector and method of forming the same

Parabolic trough or dish reflector for use in concentrating...

Parallel couette type viscous heater

Passive solar panel and construction member

Passive solar wire screens for buildings

Paving or revetment provided with a heat conveying element

Percussion mole

Percussively ignited or electrically ignited self-contained...

Perforated heat transfer sheet

Perforated transparent glazing for heat recovery and solar...

Phase change solar heating system

Phase-change heat transfer system

Photon energy converter

Photovoltaic cell support, battery made up of said cells,...

Photovoltaic support frame rail system and method for use...

Pipe and system for utilizing low-energy

Plant for recuperating heat from waste water

Plant for the preparation of potable water

Polyurethane coatings for thermally regulating and the use...